(х+9)^ + (х-11)^ = 2х^

Question

(х+9)^ + (х-11)^ = 2х^

Comments

^-это квадрат?

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да

Answer 1

(x+9)²+(x-11)²=2x²
(x²+18x+81)+(x²-22x+121)=2x²
x²+18x+81+x²-22x+121-2x²=0
-4x+202=0
-4x=202
x=202:(-4)
x=50,5